phan II F

• taught/had left

• taught/has left

• had taught/left

• has taught/left

• worked/was ringing

• were working/rang

• worked/rang

• work/rings

• were talking

• talked

• was talking

• talking

• had gone

• went

• have gone

• has gone

• have enjoyed

• would enjoy

• has enjoyed

• enjoyed

• do you learn

• did you learn

• have you learned

• are you learned